Manuel A. Jiménez, or "El Canario", is a Puerto Rican musician most famous for his work in the plena style. During the 1930s, he introduced new elements like piano, horns, and bass into plena, spreading its popularity. Wikipedia
The definitive Wikipedia entry for Manuel Jiménez. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Manuel_Jim%c3%a9nez_%28musician%29